CN210183328U - Cascade type cableless probe rod communication circuit - Google Patents
Cascade type cableless probe rod communication circuit Download PDFInfo
- Publication number
- CN210183328U CN210183328U CN201921119117.6U CN201921119117U CN210183328U CN 210183328 U CN210183328 U CN 210183328U CN 201921119117 U CN201921119117 U CN 201921119117U CN 210183328 U CN210183328 U CN 210183328U
- Authority
- CN
- China
- Prior art keywords
- resistor
- circuit module
- capacitor
- chip
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000004891 communication Methods 0.000 title claims abstract description 34
- 239000000523 sample Substances 0.000 title claims abstract description 26
- 230000008878 coupling Effects 0.000 claims abstract description 52
- 238000010168 coupling process Methods 0.000 claims abstract description 52
- 238000005859 coupling reaction Methods 0.000 claims abstract description 52
- 239000003990 capacitor Substances 0.000 claims description 145
- 230000003321 amplification Effects 0.000 claims description 27
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 101100191136 Arabidopsis thaliana PCMP-A2 gene Proteins 0.000 description 2
- 101100422768 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) SUL2 gene Proteins 0.000 description 2
- 101100048260 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) UBX2 gene Proteins 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a cascade type does not have cable probe rod communication circuit, the circuit includes low pass filter circuit module, amplifier circuit module, drive circuit module, coupling circuit module, preceding stage amplifier circuit module, band-pass filter circuit module, AGC automatic gain circuit module, comparison circuit module and coupling coil; the low-pass filter circuit module, the amplifying circuit module, the driving circuit module and the coupling circuit module are sequentially connected to form a transmitting circuit, the input end of the low-pass filter circuit module is a signal input end, the pre-stage amplifying circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module are sequentially connected to form a receiving circuit, the input end of the pre-stage amplifying circuit is connected with the other end of the coupling coil, and the output end of the comparison circuit module is a signal output end. The utility model discloses effectively realize seabed cable-free communication, transmission signal is stable, and circuit structure is simple, and is small, with low costs, can install in the probe rod.
Description
Technical Field
The utility model relates to the field of communication technology, concretely relates to cascade type does not have cable probe rod communication circuit.
Background
In environmental or engineering investigation of the sea bottom, in order to penetrate various probes or sensors used in geological investigation into the sea bottom stratum, a hollow steel pipe is generally used as a force transmission medium, and the hollow part of the hollow steel pipe is used for connecting a communication cable in a penetrating way to ensure that instruments on the ground or above the sea surface communicate with the sensors under the ground or below the sea surface, and the hollow steel pipe is also called a probe rod.
The method for penetrating and approaching the communication cable into the steel pipe has great disadvantages in practical application: firstly, before the hollow steel pipe is actually put into the sea or underground for use, communication cables must sequentially pass through the hollow steel pipe, so that the time is long, and the working efficiency is influenced; secondly, in a complex field or a submarine site with complex sea conditions, the environment has a large influence on the stability of the communication cable, a large amount of maintenance is needed, and otherwise faults such as signal instability, short circuit and the like can occur; finally, as the communication cable passes through the hollow steel pipe, when the steel pipes are additionally connected one by one, the communication cable needs to be manually arranged and installed, so that the automation difficulty of the whole set of equipment is increased.
The above problems can be readily solved if wireless communication is performed in the steel pipe. However, the existing wireless communication cannot be directly applied to the inside of the hollow steel pipe, and a communication method and a circuit which can be adapted to the hollow steel pipe and can communicate at the seabed are needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a cascade type cableless probe rod communication circuit which can solve the problem of cableless communication in seawater;
realize the technical scheme of the purpose of the utility model is that: a cascade type cableless probe rod communication circuit comprises a low-pass filter circuit module, an amplifying circuit module, a driving circuit module, a coupling circuit module, a preceding stage amplifying circuit module, a band-pass filter circuit module, an AGC automatic gain circuit module, a comparison circuit module and a coupling coil; the low-pass filter circuit module, the amplifying circuit module, the driving circuit module and the coupling circuit module are sequentially connected to form a transmitting circuit, wherein the output end of the coupling circuit module is connected with one end of the coupling coil, the input end of the low-pass filter circuit module is a signal input end, the pre-stage amplifying circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module are sequentially connected to form a receiving circuit, the input end of the pre-stage amplifying circuit is connected with the other end of the coupling coil, the output end of the comparison circuit module is a signal output end, the coupling coil is a solenoid coil and comprises a transmitting antenna and a receiving antenna, the transmitting antenna is connected with the transmitting circuit, the transmitting antenna receives a signal of the transmitting circuit and transmits the signal to the receiving antenna, the receiving antenna is connected with the receiving circuit, and the receiving antenna transmits the received signal to the receiving circuit, the transmitting circuit, the receiving circuit and the coupling coil are arranged on the probe rod to form a cable-free probe rod communication circuit;
the amplifying circuit module comprises an amplifying chip, a resistor R23 and a resistor R26, the output end of the amplifying chip U7 is connected with one end of the resistor R23, the other end of the resistor R23 is respectively connected with one end of the resistor R26 and the inverting input end of the amplifying chip, the other end of the resistor R26 is grounded, the negative voltage input end of the amplifying chip is connected with a-5V power supply, the non-inverting input end of the amplifying chip is connected with the output end of the low-pass filter circuit module, and the positive voltage input end of the amplifying chip is connected with a +5V power supply;
the driving circuit module comprises a current operational amplifier chip and a resistor R24, the current operational amplification chip comprises a resistor R25 and a resistor R21, an empty pin of the current operational amplification chip is suspended, a negative voltage input end of the current operational amplification chip is connected with a-5V power supply, a positive voltage input end of the current operational amplification chip is connected with a +5V power supply, a non-inverting input end of the current operational amplification chip is connected with an output end of the amplification circuit module, an inverting input end of the current operational amplification chip is respectively connected with one end of a resistor R24 and one end of a resistor R25, the other end of the resistor R24 is grounded, the other end of a resistor R25 is connected with an output end of the current operational amplification chip, a connection node between the resistor R25 and the output end of the current operational amplification chip is also connected with one end of a resistor R21, a pin resetting end of the current operational amplification chip is grounded, and a power-off.
Furthermore, the low-pass filter circuit module includes a signal input terminal P2, a capacitor C14, a capacitor C15, a capacitor C16, an inductor L5, an inductor L6, and a resistor R27, one end of the signal input terminal P2 is grounded, the other end is connected to one end of a capacitor C15 and one end of an inductor L6 sequentially through a capacitor C14 and an inductor L5, the other end of a capacitor C15 is connected to one end of a capacitor C16 and commonly grounded, the other end of a capacitor C16 is connected to the other end of an inductor L6, one end of a capacitor C16 connected to an inductor L6 is further connected to one end of a resistor R27, the other end of a resistor 829r 27 is connected to one end of a capacitor C16 which is grounded and commonly grounded, and one end at which the inductor L6, the resistor R27 and the capacitor C16 are commonly connected is an output.
Further, the coupling circuit module comprises a resistor R33, a capacitor C9 and a capacitor C13, wherein one end of the resistor R33 is connected with the other end of the resistor R21 and one end of the capacitor C13 respectively, the other end of the resistor R33 is connected with one end of the capacitor C9, the other end of the capacitor C9 is grounded, and the other end of the capacitor C13 is connected with the transmitting antenna.
Further, the pre-amplifier circuit module comprises an operational amplifier chip, a resistor R22, a resistor R15, a resistor R8, a resistor R6 and a relay J1, wherein an output end of the operational amplifier chip is respectively connected with one end of a resistor R8 and one end of a resistor R6, the other end of the resistor R6 is grounded through a resistor R7, a negative voltage input end of a pin of the operational amplifier chip is connected with a positive voltage input end of the operational amplifier chip connected with a-5V power supply and a +5V power supply, a non-inverting input end of the operational amplifier chip is respectively connected with one end of a resistor R15 and one end of a resistor R22, the other end of the resistor R15 is grounded, the other end of the resistor R22 is respectively connected with one end of a coupling coil and a capacitor C9, an inverting input end of the operational amplifier chip is connected with a connection node between the resistor R6 and a resistor R7, a turn-off pin of the operational amplifier chip is connected with a No. 3 pin of a relay J1, a No. 1 pin of the relay J, and the No. 2 pin is respectively connected with the power-off end of the current operational amplification chip and the turn-off pin of the operational amplification chip.
Further, the band-pass filter circuit module comprises a resistor R13, a capacitor C7, an inductor L3, an inductor L1, a capacitor C4, a capacitor C8, an inductor L4, an inductor L2 and a capacitor C5, wherein the resistor R13, the capacitor C7 and the inductor L3 are connected in parallel to form a first parallel branch, the capacitor C8 and the inductor L4 are connected in parallel to form a second parallel branch, the inductor L1 and the capacitor C4 are connected in series to form a first series branch, the inductor L2 and the capacitor C5 are connected in series to form a second series branch, one end of the first parallel branch, one end of the first series branch, one end of the second parallel branch and one end of the second series branch are sequentially connected, and one end of the resistor R13, the capacitor C7, the inductor L3, one end of the capacitor C8 and one end of the inductor L4 are commonly.
Further, the AGC automatic gain circuit module comprises a voltage-controlled VGA chip, a capacitor C1, a capacitor C2, a resistor R3, a resistor R4, a diode D5, a diode D6, a capacitor C3, a capacitor C52, a transistor Q1, a transistor Q2, a resistor R1, a resistor R2, a resistor R5, a resistor R9 and a capacitor C6; one end of a resistor R3 is connected with a +5V power supply and one end of a capacitor C1, the other end of a resistor R3 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with the other end of a capacitor C1 and one end of a capacitor C2 respectively and is grounded together, and the other end of the capacitor C2 is connected with a connection node between the resistor R3 and the resistor R4; one end of a capacitor C2 connected with a connection node between the resistor R3 and the resistor R4 is also connected with a No. 2 pin of the voltage-controlled VGA chip and the cathode of a diode D5 respectively, the cathode of the diode D5 is connected with the anode of a diode D6, the cathode of a diode D6 is connected with the anode of a diode D5, and the cathode of the diode D6 is also connected with a No. 1 pin of the voltage-controlled VGA chip; the No. 1 pin of the voltage-controlled VGA chip is respectively connected with the collector of a triode Q1 and the collector of a triode Q2, the collector of a triode Q1 is connected with the collector of a triode Q2, the connection node between the collector of the triode Q1 and the collector of a triode Q2 and the connection point between the No. 1 pin of the chip U1 are respectively grounded through a capacitor C3 and a capacitor C52, the No. 6 pin of the voltage-controlled VGA chip is connected with a-5V power supply, and the No. 8 pin of the voltage-controlled VGA chip is connected with a +5V power supply; the collector of the triode Q1 is connected with a +5V power supply through a resistor R1, the collector of the triode Q1 is further connected with one end of a resistor R2 through a resistor R1, the other end of the resistor R2 is respectively connected with the base of the triode Q1 and one end of a resistor R5, the other end of the resistor R5 is grounded, the grounding end of the resistor R5 is further connected with the base of the triode Q2, the emitter of the triode Q2 is respectively connected with the No. 5 pin and the No. 7 pin of the voltage-controlled VGA chip through a resistor R9, and the connection node between the resistor R9 and the No. 5 pin or the No. 7 pin of the voltage-controlled VGA chip is further connected with one end of a capacitor C6.
Further, the comparison circuit module includes a voltage comparison chip, a resistor R10, a resistor R11, a resistor R12, a resistor R14, a resistor R16, a capacitor C10, and an output terminal P1, one end of the resistor R11 is connected to the AGC, the other end of the resistor R11 is connected to one end of the resistor R12 and the non-inverting input terminal of the voltage comparison chip, the other end of the resistor R12 is grounded, the negative voltage input terminal of the voltage comparison chip is grounded, the positive voltage input terminal of the voltage comparison chip is connected to a +5V power supply, the turn-off signal control terminal of the voltage comparison chip is grounded, the first pin and the second pin of the voltage comparison chip are both floating, the output terminal of the voltage comparison chip is connected to one end of the output terminal P1 through the resistor R10, the other end of the output terminal P1 is grounded, the output terminal P1 serves as a signal output terminal, the inverting input, One end of the capacitor C10 is connected with one end of the resistor R16, the other end of the resistor R14 and the other end of the capacitor C10 are commonly grounded, and the other end of the resistor R16 is connected with a +5V power supply.
The automatic gain control circuit further comprises a booster circuit module and a negative voltage conversion circuit module, wherein the booster circuit module is used for boosting the power supply to +5V, and the negative voltage conversion circuit module is used for converting the +5V voltage output by the booster circuit module into-5V voltage and providing +5V and/-5V voltage for the low-pass filter circuit module, the amplifying circuit module, the driving circuit module, the coupling circuit module, the pre-stage amplifying circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module.
The utility model has the advantages that: the utility model discloses effectively realize seabed cable-free communication, the transmission signal is stable, can effectively restore the original signal that records; the circuit structure is simple, the volume is small, the cost is low, and the probe rod can be installed in the probe rod.
Drawings
Fig. 1 is a schematic block diagram of a communication circuit according to a first embodiment;
FIG. 2 is a block diagram of a boost circuit according to a first embodiment;
fig. 3 is a negative voltage converting circuit module according to the first embodiment;
FIG. 4 is a block diagram of a low pass filter circuit according to the first embodiment;
FIG. 5 is a diagram of an amplifying circuit module according to the first embodiment;
FIG. 6 is a driving circuit module according to the first embodiment;
FIG. 7 is a coupling circuit block according to the first embodiment;
fig. 8 is a pre-amplifier circuit module according to the first embodiment;
FIG. 9 is a block diagram of a band pass filter circuit according to the first embodiment;
fig. 10 is an AGC circuit block according to the first embodiment;
fig. 11 is a comparison circuit module according to the first embodiment.
Detailed Description
The invention will be further described with reference to the drawings and the embodiments.
As shown in fig. 1 to 11, a cascade type cableless probe rod communication circuit includes a low-pass filter circuit module, an amplifying circuit module, a driving circuit module, a coupling circuit module, a pre-stage amplifying circuit module, a band-pass filter circuit module, an AGC automatic gain circuit module, a comparison circuit module, and a coupling coil; the low-pass filter circuit module, the amplifying circuit module, the driving circuit module and the coupling circuit module are sequentially connected to form a transmitting circuit, wherein the output end of the coupling circuit module is connected with one end of the coupling coil, the input end of the low-pass filter circuit module is a signal input end, the pre-stage amplifying circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module are sequentially connected to form a receiving circuit, the input end of the pre-stage amplifying circuit is connected with the other end of the coupling coil, the output end of the comparison circuit module is a signal output end, the transmitting circuit sends a received signal to the coupling coil, and the coupling coil outputs the signal through the receiving circuit. The transmitting circuit, the receiving circuit and the coupling coil are installed on the probe rod to form a cable-free probe rod communication circuit.
The attenuation of the electromagnetic wave of the frequency band of 150 kHz-250 kHz by the seawater is very little, so the frequency band is largely used in the communication of seawater media. The coupling coil is a solenoid coil and comprises a transmitting antenna and a receiving antenna, the transmitting antenna is connected with the transmitting circuit, and the receiving antenna is connected with the receiving circuit. The frequency of the coupling coil is five hundred and more kHz, and the coupling frequency is 550 kHz.
In the input/output LVCMOS shown in fig. 1, the original signal is input to the circuit, the FPGA and the download circuit modulate and demodulate the signal, the DAC circuit converts the original digital signal into an analog signal and sends the analog signal to the low-pass filter circuit module, and the USB _ UART communicates the output signal of the circuit with the upper computer through the UART communication method.
The low-pass filter circuit module comprises a signal input end P2, a capacitor C14, a capacitor C15, a capacitor C16, an inductor L5, an inductor L6 and a resistor R27, wherein one end of the signal input end P2 is grounded, the other end of the signal input end P2 is respectively connected with one end of a capacitor C15 and one end of an inductor L6 through a capacitor C14 and an inductor L5 in sequence, the other end of a capacitor C15 is connected with one end of a capacitor C16 and grounded together, the other end of a capacitor C16 is connected with the other end of an inductor L6, one end of a capacitor C16 connected with an inductor L6 is also connected with one end of a resistor R27, the other end of the resistor R27 is connected with one end of a capacitor C27 which is grounded and grounded together, that is, that one end of the capacitor C27, one end of the capacitor C27 and one end of the resistor R27 are connected and grounded together, and one end of the inductor L36.
The low-pass filter circuit module is a four-order Butterworth low-pass filter, the cut-off frequency is 20MHz, and high-frequency signals of input signals are filtered out through the low-pass filter circuit module.
The capacitor C14 is 100pF, the capacitor C15 is 300pF, the capacitor C16 is 120pF, the inductor L5 is 300nH, the inductor L6 is 680nH, and the resistor R27 is 64 Ω.
The amplifying circuit module comprises an amplifying chip U7, a resistor R23 and a resistor R26, wherein the model of the amplifying chip U7 is LMH6703, a pin OUT of the amplifying chip U7 is connected with one end of the resistor R23, a pin OUT of the amplifying chip U7 is also used as an output end of the amplifying circuit module, the other end of the resistor R23 is respectively connected with one end of the resistor R26 and a pin IN-of the amplifying chip U7, the other end of the resistor R26 is grounded, a pin V-of the amplifying chip U7 is connected with a power supply of-5V, a pin IN + of the amplifying chip U7 is connected with the output end of the low-pass filter circuit module, and a pin V + of the amplifying chip U7 is connected with a power supply of + 5V.
The pin IN + is a non-inverting input terminal of the amplifying chip U7, the pin IN-is an inverting input terminal of the amplifying chip U7, the pin V-is a negative voltage input terminal of the amplifying chip U7, the pin V + is a positive voltage input terminal of the amplifying chip U7, the pin OUT is an output terminal of the amplifying chip U7, and the pin SD is a turn-off pin of the amplifying chip U7. The resistance R23 is 300 Ω, and the resistance R26 is 34 Ω.
The amplifying circuit adopts a high-speed operational amplifier LMH6703, is provided with an enabling end, can turn off a chip to eliminate interference and reduce power consumption in standby and receiving states, and has the output capacity of 90 mA.
The driving circuit module comprises a chip U6, a resistor R24, a resistor R25 and a resistor R21, the model of the chip U6 is THS3095, the chip U6 is a current feedback operational amplifier, a pin NC of the chip U6 is suspended, a pin Vs-of the chip U6 is connected with a-5V power supply, a pin Vs + of the chip U6 is connected with a +5V power supply, a pin IN + of the chip U6 is connected with an output end of the amplifying circuit module, namely, the pin IN + of the chip U6 is connected with a pin OUT of the amplifying chip U7, the pin IN-of the chip U6 is respectively connected with one end of the resistor R24 and one end of the resistor R25, the other end of the resistor R24 is grounded, and the electric power supply is connected with theThe other end of the resistor R25 is connected with a pin Vout of the chip U6, a connection node between the resistor R25 and the pin Vout of the chip U6 is also connected with one end of a resistor R21, a pin REF of the chip U6 is grounded, and a pin of the chip U6 is connected with a pin REF of the chip U3683
And the pin of the amplifying chip U7
And (4) connecting.
Wherein, the pin NC is a hollow pin, the pin Vs-is a negative voltage input terminal of the chip U6, the pin Vs + is a positive voltage input terminal of the chip U6, the pin IN + is a non-inverting input terminal of the chip U6, the pin IN-is an inverting input terminal of the chip U6, the pin REF is a resetting terminal of the chip U6, the pin Vout is an output terminal of the chip U6, and the pin Vs + is a negative voltage input terminal of the chip U6
Which is the power-off terminal of chip U6. The resistor R24 and the resistor R25 are both 1.7K Ω, and the resistor R21 is 50 Ω.
The driving circuit adopts THS3095 of TI (Texas instruments) company, has output driving capability of 350mA, has an enabling end, has a power supply range of +/-5V to +/-15V, and has high voltage expansion capability and strong driving capability.
The coupling circuit module comprises a resistor R33, a capacitor C9 and a capacitor C13, wherein one end of the resistor R33 is connected with the other end of the resistor R21 and one end of the capacitor C13 respectively, the other end of the resistor R33 is connected with one end of the capacitor C9, the other end of the capacitor C9 is grounded, and the other end of the capacitor C13 is connected with the coupling coil (not shown in the figure).
Wherein the resistor R33 is 1K omega, the capacitor C9 is 100pF, and the capacitor C13 is 4.7 nF.
The coupling frequency of the capacitor C13 and the coupling coil is 550kHz, after coupling, the coupling coil drives the frequency to 500kHz and 600kHz, the voltage at two ends of the coupling coil is obviously higher than the output voltage of the driving circuit, and the coupling circuit effectively improves the transmitting power.
The pre-amplifier circuit module comprises a chip U3, a resistor R22, a resistor R15, a resistor R8 and a resistorThe circuit comprises a resistor R6 and a relay J1, wherein the model of a chip U3 is LMH6703, a pin OUT of the chip U3 is respectively connected with one end of a resistor R8 and one end of a resistor R6, the other end of the resistor R6 is grounded through a resistor R7, a pin V-of the chip U3 is connected with a power supply of-5V, a pin V + of the chip U3 is connected with a power supply of +5V, a pin IN + of the chip U3 is respectively connected with one end of a resistor R15 and one end of a resistor R22, the other end of the resistor R15 is grounded, the other end of the resistor R22 is respectively connected with one end of a coupling coil and a capacitor C9, namely one end of a capacitor C9 connected with the coupling coil is also connected with one end of a resistor R22, a pin IN-of the chip U3 is connected with a connection node between the resistor R6 and the resistor R7
The pin SEL2 of the relay J1 is connected with the pin SEL 3684 of the relay J1, the pin 1 of the relay J1 is grounded, the pin 4 of the relay J1 is connected with a +5V power supply, and the pin SEL1 is respectively connected with the pin of the chip U6
And pin of amplifying chip U7
In connection, pin SEL1 is pin number 2 and pin SEL2 is pin number 3.
The resistor R6 is 300 Ω, the resistor R7 is 34 Ω, the resistor R8 is 50 Ω, the resistor 15 is 1K Ω, and the resistor R22 is 1K Ω.
The pre-stage amplifying circuit adopts a high-speed operational amplifier LMH6703, and the amplification factor is 10 times.
The band-pass filter circuit module comprises a resistor R13, a capacitor C7, an inductor L3, an inductor L1, a capacitor C4, a capacitor C8, an inductor L4, an inductor L2 and a capacitor C5, a resistor R13, a capacitor C7 and an inductor L3 are connected in parallel to form a first parallel branch, the capacitor C8 and the inductor L4 are connected in parallel to form a second parallel branch, the inductor L1 and the capacitor C4 are connected in series to form a first series branch, the inductor L2 and the capacitor C5 are connected in series to form a second series branch, and one end of the first parallel branch, one end of the first series branch, one end of the second parallel branch and the second series branch are sequentially connected. The other end of the first parallel branch and the other end of the second parallel branch are commonly grounded, that is, one end of the resistor R13, the capacitor C7, the inductor L3, the capacitor C8 and the inductor L4 is commonly grounded.
One end of the capacitor C5 is connected to the other end of the resistor R8, and the other end of the capacitor C5 is connected to the inductor L2.
The resistor R13 is 50 omega, the capacitors C7, C4, C5 and C8 are all 300pF, and the inductors L1, L2, L3 and L4 are all 750 nH.
The band-pass filter circuit is a four-order Butterworth band-pass filter, so that the attenuation of effective signals is reduced, and the frequency band range is expanded.
The AGC automatic gain circuit module comprises a chip U1, a capacitor C1, a capacitor C2, a resistor R3, a resistor R4, a diode D5, a diode D6, a capacitor C3, a capacitor C52, a triode Q1, a triode Q2, a resistor R1, a resistor R2, a resistor R5, a resistor R9 and a capacitor C6; one end of a resistor R3 is connected with a +5V power supply and one end of a capacitor C1, the other end of a resistor R3 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with the other end of a capacitor C1 and one end of a capacitor C2 respectively and is grounded together, and the other end of the capacitor C2 is connected with a connection node between the resistor R3 and the resistor R4; one end of a capacitor C2 connected with a connection node between the resistor R3 and the resistor R4 is also connected with a pin No. 2 of the chip U1 and the cathode of the diode D5 respectively, the cathode of the diode D5 is connected with the anode of the diode D6, the cathode of the diode D6 is connected with the anode of the diode D5, the cathode of the diode D6 is also connected with a pin No. 1 of the chip U1, namely, the connection node between the cathode of the diode D6 and the anode of the diode D5 is connected with a pin No. 1 of the chip U1; pin 1 of a chip U1 is connected with a collector of a triode Q1 and a collector of a triode Q2 respectively, a collector of the triode Q1 is connected with a collector of a triode Q2, namely a connecting node between the collector of the triode Q1 and the collector of a triode Q2 is connected with a pin of the chip U1, a connecting node between the collector of the triode Q1 and the collector of the triode Q2 is grounded with a connecting point between pins 1 of the chip U1 through a capacitor C3 and a capacitor C52 respectively, pin 6 of the chip U1 is connected with a power supply of-5V, and pin 8 of the chip U1 is connected with a power supply of + 5V; the collector of the triode Q1 is connected with a +5V power supply through a resistor R1, the collector of the triode Q1 is further connected with one end of a resistor R2 through a resistor R1, the other end of the resistor R2 is connected with the base of the triode Q1 and one end of a resistor R5 respectively, the other end of the resistor R5 is grounded, the ground terminal of the resistor R5 is further connected with the base of the triode Q2, the emitter of the triode Q2 is connected with the pin No. 5 and the pin No. 7 of the chip U1 through a resistor R9, that is, the pin No. 5 and the pin No. 7 of the chip U1 are connected with one end of the resistor R9 together, the connection node between the pin No. 5 or the pin No. 7 of the resistor R9 and the chip U1 is further connected with one end of a capacitor C6, and the pin No. 3 of the chip U1 is connected with the non-ground terminal of the resistor R13, so that.
The model of the chip U1 is AD603AR, the chip belongs to a voltage-controlled VGA chip, the models of diodes D5 and D6 are IN4148, capacitors C1, C2, C3 and C52 are 104pF, the capacitor C6 is 105pF, a resistor R1 is 1K omega, a resistor R2 is 1.2K omega, a resistor R3 is 10K omega, a resistor R4 is 1.1K omega, a resistor R5 is 3.9K omega, and a resistor R9 is 2K omega.
The AGC automatic gain circuit module is a negative feedback system, the range of AD603AR adopted by a chip U1 is-10 dB-31dB, and diodes D5 and D6 limit the occurrence of overhigh gain and interference in static state or standby state.
The comparison circuit module comprises a chip U2, a resistor R10, a resistor R11, a resistor R12, a resistor R14, a resistor R16, a capacitor C10 and an output end P1, wherein one end of the resistor R11 is connected with the other end of the capacitor C6, the other end of the resistor R11 is respectively connected with one end of a resistor R12 and a pin IN + of the chip U2, the other end of the resistor R2 is grounded, a pin-Vs of the chip U2 is grounded, a pin + Vs of the chip U2 is connected with a power supply of +5V, a pin SHDN of the chip U2 is grounded, a pin NC 1 and a pin NC 5 of the chip U2 are both suspended, a pin Vout of the chip U2 is connected with one end of the output end P2 through the resistor R2, the other end of the output end P2 is grounded, the output end P2 is a signal output end, a pin IN-of the chip U2 is respectively connected with one end of the resistor R2, one end of the capacitor C2 and the other end of the resistor R2, the other end of the resistor R16 is connected to a +5V power supply.
The model of the chip 2 is TLV3501, the pin SHDN is a turn-off signal control terminal, the resistors R10, R11, R12 and R14 are all 50 Ω, the resistor R16 is 2.4K Ω, and the capacitor C10 is 104 pF.
The comparison circuit module adopts a high-speed comparator TLV3501, is a voltage comparison chip, and the comparison voltage is set to be 100mV for preventing various interference signals.
The low-pass filter circuit module, the amplifier circuit module, the driving circuit module, the coupling circuit module, the pre-stage amplifier circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit all need to use a +5V and/or-5V power supply, and the power supply of a common system is +5V, so a negative voltage conversion circuit module is also needed, the negative voltage conversion circuit module converts the input +5V voltage into a-5V voltage for output, the-5V voltage output by the negative voltage conversion circuit module and supplies a-5V voltage to the low-pass filter circuit module, the amplifier circuit module, the driving circuit module, the coupling circuit module, the pre-stage amplifier circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module which need to be-5V, and the model number of a voltage conversion chip of the negative voltage conversion circuit module is LT1611, the specific circuit is shown in fig. 3.
The system power supply needs to be stable at +5V, so that a +5V booster circuit module is needed, the booster circuit module outputs +5V to the negative voltage conversion circuit module, and +5V voltage of the low-pass filter circuit module, the amplification circuit module, the driving circuit module, the coupling circuit module, the pre-stage amplification circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit is output, the model of a booster chip of the booster circuit module is CS5173, and a specific circuit is shown in FIG. 2.
The embodiment disclosed in this specification is only an example of the single-sided features of the present invention, and the protection scope of the present invention is not limited to this embodiment, and any other embodiments having equivalent functions all fall into the protection scope of the present invention. Various other changes and modifications may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such changes and modifications should fall within the scope of the present invention.
Claims (8)
1. The utility model provides a cascade type does not have cable probe rod communication circuit which characterized in that: the automatic gain control circuit comprises a low-pass filter circuit module, an amplifying circuit module, a driving circuit module, a coupling circuit module, a preceding stage amplifying circuit module, a band-pass filter circuit module, an AGC automatic gain circuit module, a comparison circuit module and a coupling coil; the low-pass filter circuit module, the amplifying circuit module, the driving circuit module and the coupling circuit module are sequentially connected to form a transmitting circuit, wherein the output end of the coupling circuit module is connected with one end of the coupling coil, the input end of the low-pass filter circuit module is a signal input end, the pre-stage amplifying circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module are sequentially connected to form a receiving circuit, the input end of the pre-stage amplifying circuit is connected with the other end of the coupling coil, the output end of the comparison circuit module is a signal output end, the coupling coil is a solenoid coil and comprises a transmitting antenna and a receiving antenna, the transmitting antenna is connected with the transmitting circuit, the transmitting antenna receives a signal of the transmitting circuit and transmits the signal to the receiving antenna, the receiving antenna is connected with the receiving circuit, and the receiving antenna transmits the received signal to the receiving circuit, the transmitting circuit, the receiving circuit and the coupling coil are arranged on the probe rod to form a cable-free probe rod communication circuit;
the amplifying circuit module comprises an amplifying chip, a resistor R23 and a resistor R26, the output end of the amplifying chip U7 is connected with one end of the resistor R23, the other end of the resistor R23 is respectively connected with one end of the resistor R26 and the inverting input end of the amplifying chip, the other end of the resistor R26 is grounded, the negative voltage input end of the amplifying chip is connected with a-5V power supply, the non-inverting input end of the amplifying chip is connected with the output end of the low-pass filter circuit module, and the positive voltage input end of the amplifying chip is connected with a +5V power supply;
the driving circuit module comprises a current operational amplifier chip and a resistor R24, the current operational amplification chip comprises a resistor R25 and a resistor R21, an empty pin of the current operational amplification chip is suspended, a negative voltage input end of the current operational amplification chip is connected with a-5V power supply, a positive voltage input end of the current operational amplification chip is connected with a +5V power supply, a non-inverting input end of the current operational amplification chip is connected with an output end of the amplification circuit module, an inverting input end of the current operational amplification chip is respectively connected with one end of a resistor R24 and one end of a resistor R25, the other end of the resistor R24 is grounded, the other end of a resistor R25 is connected with an output end of the current operational amplification chip, a connection node between the resistor R25 and the output end of the current operational amplification chip is also connected with one end of a resistor R21, a pin resetting end of the current operational amplification chip is grounded, and a power-off.
2. The cascaded untethered probe communication circuit of claim 1, wherein: the low-pass filter circuit module comprises a signal input end P2, a capacitor C14, a capacitor C15, a capacitor C16, an inductor L5, an inductor L6 and a resistor R27, wherein one end of the signal input end P2 is grounded, the other end of the signal input end P2 is connected with one end of the capacitor C15 and one end of the inductor L6 sequentially through the capacitor C14 and the inductor L5 respectively, the other end of the capacitor C15 is connected with one end of the capacitor C16 and grounded together, the other end of the capacitor C16 is connected with the other end of the inductor L6, one end of the capacitor C16 connected with the inductor L6 is also connected with one end of the resistor R27, the other end of the resistor R27 is connected with one end of the capacitor C16, grounded together, and one end of the inductor L6, the resistor R27 and the capacitor C16.
3. The cascaded untethered probe communication circuit of claim 1, wherein: the coupling circuit module comprises a resistor R33, a capacitor C9 and a capacitor C13, one end of the resistor R33 is connected with the other end of the resistor R21 and one end of the capacitor C13 respectively, the other end of the resistor R33 is connected with one end of the capacitor C9, the other end of the capacitor C9 is grounded, and the other end of the capacitor C13 is connected with the transmitting antenna.
4. The cascaded untethered probe communication circuit of claim 1, wherein: the pre-amplifier circuit module comprises an operational amplifier chip, a resistor R22, a resistor R15, a resistor R8, a resistor R6 and a relay J1, wherein the output end of the operational amplifier chip is respectively connected with one end of a resistor R8 and one end of a resistor R6, the other end of the resistor R6 is grounded through a resistor R7, the negative voltage input end of a pin of the operational amplifier chip is connected with a-5V power supply to connect the positive voltage input end of the operational amplifier chip with a +5V power supply, the non-inverting input end of the operational amplifier chip is respectively connected with one end of a resistor R15 and one end of a resistor R22, the other end of the resistor R15 is grounded, the other end of the resistor R22 is respectively connected with a coupling coil and one end of a capacitor C9, the inverting input end of the operational amplifier chip is connected with a connecting node between a resistor R6 and a resistor R7, the turn-off pin of the operational amplifier chip is connected with the No. 3 pin of a relay J1, the No. 1 pin of the, and the No. 2 pin is respectively connected with the power-off end of the current operational amplification chip and the turn-off pin of the operational amplification chip.
5. The cascaded untethered probe communication circuit of claim 1, wherein: the band-pass filter circuit module comprises a resistor R13, a capacitor C7, an inductor L3, an inductor L1, a capacitor C4, a capacitor C8, an inductor L4, an inductor L2 and a capacitor C5, wherein the resistor R13, the capacitor C7 and the inductor L3 are connected in parallel to form a first parallel branch, the capacitor C8 and the inductor L4 are connected in parallel to form a second parallel branch, the inductor L1 and the capacitor C4 are connected in series to form a first series branch, the inductor L2 and the capacitor C5 are connected in series to form a second series branch, one end of the first parallel branch, one end of the first series branch, one end of the second parallel branch and one end of the second series branch are sequentially connected, and one end of the resistor R13, the capacitor C7, the inductor L3, one end of the capacitor C8 and one end of the inductor L4.
6. The cascaded untethered probe communication circuit of claim 1, wherein: the AGC automatic gain circuit module comprises a voltage-controlled VGA chip, a capacitor C1, a capacitor C2, a resistor R3, a resistor R4, a diode D5, a diode D6, a capacitor C3, a capacitor C52, a triode Q1, a triode Q2, a resistor R1, a resistor R2, a resistor R5, a resistor R9 and a capacitor C6; one end of a resistor R3 is connected with a +5V power supply and one end of a capacitor C1, the other end of a resistor R3 is connected with one end of a resistor R4, the other end of the resistor R4 is connected with the other end of a capacitor C1 and one end of a capacitor C2 respectively and is grounded together, and the other end of the capacitor C2 is connected with a connection node between the resistor R3 and the resistor R4; one end of a capacitor C2 connected with a connection node between the resistor R3 and the resistor R4 is also connected with a No. 2 pin of the voltage-controlled VGA chip and the cathode of a diode D5 respectively, the cathode of the diode D5 is connected with the anode of a diode D6, the cathode of a diode D6 is connected with the anode of a diode D5, and the cathode of the diode D6 is also connected with a No. 1 pin of the voltage-controlled VGA chip; the No. 1 pin of the voltage-controlled VGA chip is respectively connected with the collector of a triode Q1 and the collector of a triode Q2, the collector of a triode Q1 is connected with the collector of a triode Q2, the connection node between the collector of the triode Q1 and the collector of a triode Q2 and the connection point between the No. 1 pin of the chip U1 are respectively grounded through a capacitor C3 and a capacitor C52, the No. 6 pin of the voltage-controlled VGA chip is connected with a-5V power supply, and the No. 8 pin of the voltage-controlled VGA chip is connected with a +5V power supply; the collector of the triode Q1 is connected with a +5V power supply through a resistor R1, the collector of the triode Q1 is further connected with one end of a resistor R2 through a resistor R1, the other end of the resistor R2 is respectively connected with the base of the triode Q1 and one end of a resistor R5, the other end of the resistor R5 is grounded, the grounding end of the resistor R5 is further connected with the base of the triode Q2, the emitter of the triode Q2 is respectively connected with the No. 5 pin and the No. 7 pin of the voltage-controlled VGA chip through a resistor R9, and the connection node between the resistor R9 and the No. 5 pin or the No. 7 pin of the voltage-controlled VGA chip is further connected with one end of a capacitor C6.
7. The cascaded untethered probe communication circuit of claim 1, wherein: the comparison circuit module comprises a voltage comparison chip, a resistor R10, a resistor R11, a resistor R12, a resistor R14, a resistor R16, a capacitor C10 and an output end P1, wherein one end of the resistor R11 is connected with the AGC automatic gain circuit module, the other end of the resistor R11 is respectively connected with one end of a resistor R12 and the non-inverting input end of the voltage comparison chip, the other end of the resistor R12 is grounded, the negative voltage input end of the voltage comparison chip is grounded, the positive voltage input end of the voltage comparison chip is connected with a +5V power supply, the turn-off signal control end of the voltage comparison chip is grounded, the first and second pins of the voltage comparison chip are both suspended, the output end of the voltage comparison chip is connected with one end of an output end P1 through a resistor R10, the other end of the output end P1 is grounded, the output end P1 serves as a signal output end, the inverting input end of the voltage comparison chip is respectively connected with one end of a resistor R14, the other end of the resistor R14 and the other end of the capacitor C10 are grounded together, and the other end of the resistor R16 is connected to a +5V power supply.
8. The cascaded untethered probe communication circuit of claim 1, wherein: the automatic gain control circuit also comprises a booster circuit module and a negative voltage conversion circuit module, wherein the booster circuit module is used for boosting the power supply to +5V, and the negative voltage conversion circuit module is used for converting the +5V voltage output by the booster circuit module into-5V voltage and providing +5V and/-5V voltage for the low-pass filter circuit module, the amplifying circuit module, the driving circuit module, the coupling circuit module, the preceding stage amplifying circuit module, the band-pass filter circuit module, the AGC automatic gain circuit module and the comparison circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119117.6U CN210183328U (en) | 2019-07-16 | 2019-07-16 | Cascade type cableless probe rod communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921119117.6U CN210183328U (en) | 2019-07-16 | 2019-07-16 | Cascade type cableless probe rod communication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210183328U true CN210183328U (en) | 2020-03-24 |
Family
ID=69841075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921119117.6U Withdrawn - After Issue CN210183328U (en) | 2019-07-16 | 2019-07-16 | Cascade type cableless probe rod communication circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210183328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336579A (en) * | 2019-07-16 | 2019-10-15 | 武汉磐索地勘科技有限公司 | The untethered feeler lever communication means of tandem type and circuit |
-
2019
- 2019-07-16 CN CN201921119117.6U patent/CN210183328U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336579A (en) * | 2019-07-16 | 2019-10-15 | 武汉磐索地勘科技有限公司 | The untethered feeler lever communication means of tandem type and circuit |
| CN110336579B (en) * | 2019-07-16 | 2024-06-07 | 武汉磐索地勘科技有限公司 | Cascade type cable-free probe rod communication method and circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7969151B2 (en) | Pre-amplifier and mixer circuitry for a locator antenna | |
| CN110324431B (en) | User data management system based on cloud computing | |
| CN110233633A (en) | A kind of data transfer of computer system based on Internet of Things | |
| CN110376989B (en) | Industrial control system based on big data | |
| CN206321965U (en) | A kind of working frequency control system and electronic smoking set | |
| CN210183328U (en) | Cascade type cableless probe rod communication circuit | |
| CN109905088A (en) | A kind of power transmission real-time monitoring system | |
| CN110299929B (en) | Intelligent planning system for tour route | |
| CN211426816U (en) | Low-power consumption wireless seismic data recording device | |
| CN110336579B (en) | Cascade type cable-free probe rod communication method and circuit | |
| CN209462351U (en) | A kind of campus access control system | |
| CN204374227U (en) | For the signal acquisition circuit of motor speed test | |
| CN204810253U (en) | Analog input circuit | |
| CN111291423A (en) | Safety protection system of block chain | |
| CN212850559U (en) | Underground wireless short-transmission FSK receiving mixer circuit | |
| CN210244635U (en) | Road traffic signal lamp based on 5G technology | |
| CN110752864A (en) | Communication interface circuit based on power cord | |
| CN109104180A (en) | electronic information data processing system | |
| CN210487857U (en) | Fault information mining system based on big data | |
| CN209879334U (en) | Computer analog signal calibration system | |
| CN111490800B (en) | Power distribution cabinet management system based on internet | |
| CN209881753U (en) | Safe power supply for main magnetic pole of electron accelerator | |
| CN104242831A (en) | Wideband amplification device with low noise | |
| CN209218064U (en) | A kind of wisdom EHS management system | |
| CN203104510U (en) | Mixed modulation and demodulation circuit based on OFDM |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200324 Effective date of abandoning: 20240607 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200324 Effective date of abandoning: 20240607 |